Distributing device for the charge of shaft furnaces



ully I7 I95? Filed June 24, 1949 M. A. BRUN AL DISTRIBUTING DEVICE FOR THE CHARGE OF SHAFT FURNACES zmwm 2 Sheets-Sheet l Juiy 17, 1951 M. A. RUN AL 2,56%844 DISTRIBUTING DEVICE FOR THE CHARGE OF SHAFT FURNACES Filed June 24, 1949 2 Sheets-Sheet 2 Patented July 17, 195i DESTRIBFU'EING DEVICE FOR THE CHARGE OF SHAFT FURNACES Max A. Brun, Rumbas, and Lon F. Sauvage, Homecourt, France, assignors to Compagnie des Forges ct Acieries de la Marine et dHomecoui-t (Societe Anonyme) and Societe Lorraine des Acieries de Rumbas (Societe Anonyme), both of Paris, France, and both companies of France Application June 24, 1949,Serial No. 101,124

In France July 16, 1948 In our co-pending U. S. patent application Serial No. 39,914, filed July 15, 1948, we have described a'distributing device for the charges in shaft furnaces, made of a series of pivoted panels arranged according to a crown on a stationary frame, provided inside the top of a furnace. These panels overlap one another and are mount-- ed as an umbrella, in such a manner that they can simultaneously take a variable slope, which determines the diameter of the circular jet when the charge is falling. They are simultaneously operated by means of a suitable control device.

The panels are plane or dihedral. The plane panels, which are pivoted at their upper portion on the central frame, are the only ones which are operated by the driving mechanism. The dihedral panels, inserted between two consecutive plane panels in order to partially overlap them, are connected to the central frame by a double pivoting, in such a manner that they may bear on the driven plane panels along their whole length, whatever be the slope given to said panels.

In our above mentioned patent application, we have also described a driving mechanism of the plane panels, and consequently of the whole distributing device, comprising a horizontal beam diametrically arranged at the upper part of the furnace and which may be raised or lowered by a suitable mechanism while remaining constantly horizontal. This beam supports a vertical columnarranged along the axis of the furnace. At the upper part of this column are pivoted the connecting rods operating the plane panels, which are pivoted at their other end at the lower portion of said panels. zontal beam thus corresponds a determined slope of the panels of the distributing device.

In the same patent application, the circular beam supporting the panels may be hung on the cone protecting the device, which is itself supported by radial brackets secured to the wall of the top.

The main objects of our present invention are:

1. To simplify the device supporting the panels in order to enable a free expansion of said device,

2. To reduce the number of the pivotings of the driving mechanism,

3. To enable an easier discarding of certain parts.

According to the invention, the circular beam on which the various panels are pivoted can be hung on a diametral beam maintained at the top of the furnace, in such a way that it can freely expand, and each plane panel can be integral with a radial arm bearing a roller at its free end,

At each position of the hori- 6 Claims. (Cl. 214-35) a roller which is maintained by the weight of the panel against a central plate attached to a diametral beam freely expanding which can be displaced vertically, while remaining horizontal, by an appropriate operating mechanism.

In that case, the diametral suspension beam may conveniently have a cross-section in the shape of an inverted U, and be supported, by its two ends, inside boxes attached to the wall outside the furnace. The diametral beam drivin the motion of the panels will be placed inside the U beam and freely engaged by its two ends in two rods guided vertically and displaced in synchronism by screw-jacks.

The lateral boxes can have as a cover a detachable part, permitting the extraction laterally of the beam and the plate driving the panels.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure l is a vertical cross-section taken on the axis of the distributing device,

Figure 2 is a horizontal section taken on line II-II of Figure 1,

Figure 3 is a vertical section taken on line IIIIII of Figure 1, and

Figure 4 is a diagrammatical view of one of the utilizable devices for the operation of the diametral beam.

In the embodiment shown in the drawing, the distributing device is hung on a fixed dianietral beam bearing freely at its two ends on supports 5! designed inside two boxes 52 attached to the wall of the top. This hollow beam in the shape of an inverted U can thus freely expand, and is maintained below the charging device at a distance only just suiiicient for enabling the bell 2 to normally open.

A fixed circular beam on which plane panels 5 and dihedral panels 9 are pivoted, is hung on or supported by the diametral beam be by steel fittings 54 and, as in already described devices, a protection cone 25 prevents the fall of the charge into the variable truncated pyramid formed by the movable panels.

To each plane panel 5 hung on circular beam 30, by a pivoting axle l, is invariabl linked an arm 55 placed in a radial plane of the furnace; this arm is provided at its end with a roller 56.

Each dihedral panel, 6 bears on plane panels ll between which it is placed, and is linked to the circular beam by the double pivoted rod ll.

Inside the beam 50, in the shape of an inverted U, is placeda horizontal beam -7 which adjusts the panels. The latter'beam is movable vertically and carries in its middle a circular horizontal plate 58 which rests on rollers 56 secured to the plane panels.

Each end of the movahlebeam 51 engages, in such a way that it can freely expand, a vertical cylindrical driving rod 59 guided above and below; all inclination of beam 51 is thus-prevented. Both rods 59 are compelledb'y the adjusting'device to always have a travel absoliitely'the same, and the beam 51 thus remains --constantly horizontal in all its positions, at the same time as plate 58. The latter being plane, an o'if setting from its center has no influence on the'working of the distributing panels. 4

Plate 58 can only rest on rollers 56, and when going down causes the umbrella to open. When 'th'e'plate is lifted, the closing is obtained automatically the weight of the panels and by the fall of'the charge on'them. Atever'y p'osition of the plate corresponds one slope'of the panels of the distributing device.

Each one of rods 59 passes through a tight stuffing box 6!? in the upper part'of the cover 52a of each of 'thefboxes52 attached to the "outside wall of the furnace and'is actuated by a reversible screw-jacks! secured'to this cover.

The guiding'of 'eac'hrodis obtained'at'the upperpart by stuffing-box 6G and atthe lower part by a tubular grip integral with the'cover 52a and surrounding rodtil on about of itsperiphery.

The arrangement including "the cover 5200f the box, rod 59 and itsscrew-J'ac'k 61 can be-ea'sily removed. Beam 57 'is then accessible and can also be brought out throu'ghthe open-box, boxes 52 and the suspension of the internal circular beam 3% being designed in 'ordertoallo'w the passage of beam 5'? and plate 53.

Both screw-jacks '6! actuating beam -51 are identical and are simultaneously drive'n 'by two identical transmissions.

In the embodiment shown-in Figs-'4 both screw "jacks 6| which each-carry a conical pinion 63 are driven in unison by two pinionsltt receiving their motion by means of a transmission including a chain 65. Both chains 55 are actuated 'by'two shafts, placed at right angles, linked-by conical pinions to any-electric, hydraulic motor or any motor of any other type, the reversibility of screwjacks enabling to adopt anydesired solution. In Fig. 4 a hydraulic cylinder 61 actuates arack =68 producing the rotation of shafts -i56-by properintermediary gears 69 and 10.

The drive of the screw-jacks by-ch'aingthat-is by a non-rigid link, has the advantager-oflpermitting the arrangement of the motor at any height and to thus avoid the possible obstacles,

and pecially intake gas ducts.

In the arrangement which is above described, the device sustaining the distributing device is limited to a hollow diametral beam, inwhichis .placed the beam actuating the panels. Possibilities of hanging or clogging by certain materials, such as scrap or steel burnings are thus reduced to a minimum.

The beam actuating the panels is rectilinear and easily removable; its position above the distributing device reduces itslengthinathe case of tops having the shape. of a truncatedgcone.

Finally, the numberof pivots unchangedsfor and between two consecutive and central plate beam horizontal whereby said rollers are urged to varythe slope of said plane panels.

that various changes in the shape, size and arrangement of parts may be resorted to Without departing fromthe spirit of our invention or the scope of the subjoined claims.

We claim:

'1. A device for the distribution of the charges in a shaft furnace which comprises a first diametral beam secured at the top of the furnace and adapted to freely expand; a circular beam supported by said diametral beam; a set of regulargly spaced plane panels pivoted at their upper end on said circular beam; a radial arm extending from each plane panel ;-a roller provided at theend of each radial arm; a set of dihedral panels pivoted near their upper ends on .said

circular beam, each dihedral panel set outside plane panels being adapted to cover the edges of the plane .panels whatever be their slope; a second diaarranged .at the top of the furto be vertically moved; acentral plate secured to said second diametral'beam, arranged'and adapted to bear on said rollers; and means to vertically move the second beam while keeping the second metral beam, nace, adapted 2. A der/ice according to claim-l, in which the first diametral beam has the shape ofan inverted U, two bearers are provided outside the top of :the furnace, both. ends of said first diametral beam are supported outside the furnace-by-said bearersand two boxes are secured to the-outsidewall'of the furnace to enclose said-bearers. 3. A-device according to claim 1, in which the first diametral beam has the shape of an inverted U, and the second-diametral beam is'arranged-inside said first diametral beam.

"4. A devicefor the distribution of the charges in a shaft furnace which comprises -a-firstdiametral beam secured at the top of the furnace :-and adapted to freely expand; a circularbeam ssupported bysaid diametral beam;.a set ofiregularly spaced pane-ls pivoted at theirupper end on said circular beam; -a radial arm extending from-each plane panel; a roller provided -at-the end of each radial arm; a set of'dihedral panels pivoted near their upper ends onsaid circular beam, each dihedral panel set outside and between two consecutive plane panels being adapted-to cover the edges of therplane panels whatever be their slope; a second :diametral -beam arranged at the top of the furnace; two

vertical rods adapted to be vertically movedarranged at the ends-of said second diametralbeam so that the ends of said second "beam engage them, -a1central plate secured to said second diametral beam, arranged and adapted-to bear on said rollers; and means to vertically inove :said vertical rods, second beam and central plate, while keeping the second beam horizontal whereby said rollers are urged to varythe slope of said plane panels.

5.-A device for-the distribution of the charges in-,a shaft furnace-which comprises two bearers secured outside the topcfthe furnace; a' first diametral beam, having ,the :shape of an ;-in-

verted U, supported by said bearers; two boxes secured to the outside wall of the furnace enclosing said bearers; a circular beam supported by said diametral beam; a set of regularly spaced plane panels pivoted at their upper end on said circular beam; a radial arm extending from each plane panel; a roller provided at the end of each radial arm; a set of dihedral panels pivoted near their upper ends on said circular beam, each dihedral panel being set outside, between two consecutive plane panels, adapted to cover the edges of the plane panels whatever be their slope; a second diametral beam arranged at the top of the furnace; two vertical rods adapted to be vertically moved, arranged at the ends of said second diametral beam so that the ends of said second beam engage them; a gas tight stuffing-box arranged at the upper part of each one of both said boxes, each adapted to guide prises a screw jack secured at the upper part of each one of said boxes, adapted to vertically move the corresponding vertical rod; two identical drive systems comprising each a sprocketchain for both said screw jacks; and a motor adapted to actuate both drive systems.

A. BRUN. LEON F. SAUVAGE.

N 0 references cited. 

